Wyniki wyszukiwania - Biblioteka Nauki

1

Gas hold-up for self-aspirating impellers

100%

Heim A. , Kuncewicz C. , Rzyski E. , Stelmach J.

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2000

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tom Vol. 5, no 3

685-693

EN

Gas hold-up for self-aspirating disk impellers was determined experimentally. Process parameters such as rotations frequency, impeller size and height of liquid level over the impeller were found to have the greatest impact on its value. The effect of viscosity of the liquid being aerated is much weaker - the investigations were carried out with several liquids differing in viscosity. It was also found that the width of the outlet slots of the impeller had a slight influence on gas hold-up.

2

Studies of mixing time and momentum transfer for an agitated with an off-centred impeller

84%

Karcz J. , Cudak M. , Szoplik J.

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2006

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tom Vol. 8, nr 1

35-42

EN

In many industrial processes, the final technological effect related to the product quality strictly depends on the efficiency of agitation. The effects of the impeller eccentricity and liquid pumping mode of the impeller on the liquid homogenisation and momentum transfer processes are discussed in the paper. The mixing time tm in an un - baffled agitated vessel of working volume V = 0.27 m^3 was measured using thermal method. The dimensionless shear rate gamma/n and friction coefficient f on the cylindrical wall of the vessel of the volume V = 0.022 m^3 were determined by means of an electrochemical method. The distribution of both gamma/n and f values is found as a function of the impeller eccentricity eR for a propeller and HE 3 impeller. The data for dimensionless mixing time were correlated using Eq. (1). The values of gamma/n and f, averaged for the whole cylindrical wall, were described for both the propeller and HE 3 impeller, by means of Eqs. (2) - (5).

3

Wpływ typu i konfiguracji mieszadeł na wspólnym wale na warunki dyspergowania gazu w cieczy

84%

Adamiak R.

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2006

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tom Nr 6s

7-9

EN

The experimental studies dealing with the power consumption and gas hold-up in a stirred tank equipped with the single or dual high-speed impellers are presented. The results for different configurations of impellers situated on the shaft were compared. The influence of the diameter and configuration of impellers on the gas distribution into liquid was evaluated.

4

Escitalopram w leczeniu zaburzeń psychicznych chorych w podeszłym wieku

67%

Sobów T.

Psychiatria i Psychologia Kliniczna

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2015

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tom 15

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nr 2

93-98

EN

The pharmacotherapy of mental disorders is often difficult in the elderly and might be limited by several factors, including medication side effects, drug–drug interactions as well as psychiatric and somatic comorbidities, which are all more common than in younger patients. These aspects of therapy, together with the multifactorial pathogenesis as well as a well-known increased placebo response, lead to overall lower effectiveness of drug therapies in the elderly. The choice of medication, taking into account its proven efficacy and safety, is therefore a key to a successful treatment. Escitalopram is a promising agent for treating older patients. Its pharmacodynamic selectivity, beneficial pharmacokinetic profile (including a relatively low potential of inducing drug interactions) and relatively rare incidence of severe side effects, together with acceptable efficacy in clinical trials, resulted in its common use for the treatment of mood and anxiety disorders (including those with presumable organic causes) and, recently, as a drug for agitation, aggression and psychosis that accompany dementia of the Alzheimer’s type. Additionally, escitalopram is easy to use. A once-daily schedule as well as the availability of a non-tablet formulation (oral drops) is a further advantage, particularly for patients with swallowing difficulties, gastrostomy (enteral nutrition), those who take many medications and for patients with cognitive impairment.

PL

Farmakoterapia zaburzeń psychicznych u chorych w podeszłym wieku jest często trudna i ograniczona powszechniejszym niż u młodszych chorych występowaniem objawów niepożądanych, interakcji lekowych oraz koniecznością brania pod uwagę współchorobowości, nie tylko psychiatrycznej, ale przede wszystkim – somatycznej. Te aspekty, razem z wieloczynnikową patogenezą zaburzeń i znaczną w wielu badaniach odpowiedzią placebo, prowadzą do względnie niższych wskaźników efektywności klinicznej leczenia. Właściwy wybór leku, uwzględniający jego skuteczność i bezpieczeństwo, jest zatem kluczowy dla sukcesu terapii. Escitalopram to obiecujący lek dla starszych chorych. Jego znaczna selektywność farmakodynamiczna, korzystny profil farmakokinetyczny, w tym stosunkowo niewielki potencjał wchodzenia w interakcje lekowe, oraz dość rzadkie wywoływanie poważnych objawów ubocznych spowodowały – wraz z zadowalającymi wynikami badań klinicznych – częste i z korzyścią dla pacjentów stosowanie escitalopramu w zaburzeniach nastroju (także w tzw. organicznych) i zaburzeniach lękowych, a ostatnio jako leku korygującego zaburzenia zachowania towarzyszące otępieniu, takie jak pobudzenie, agresja czy psychoza. Dodatkowym ważnym aspektem stosowania escitalopramu jest łatwość podawania (jedna dawka na dobę) oraz dostępność postaci w kroplach, która może być szczególnie użyteczna dla chorych z problemami w połykaniu, przyjmujących wiele leków, karmionych poprzez gastrostomię czy z zaburzeniami funkcji poznawczych.

5

Mixing in two-phase systems in the presence of non-Newtonian media

67%

Broniarz-Press L. , Borowski J. , Szaferski W.

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2006

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tom Vol. 8, nr 1

54-60

EN

The paper presents some chosen questions of the non-Newtonian properties of a liquid effect on suspending and aeration in agitated systems. Special attention throughout the study was paid to the critical agitator speed and gas hold-up in viscous power-law liquids (aqueous solutions of high-molecular carboxymethylcellulose sodium salt and polyacrylamide). The tested agitator was the standard Rushton turbine. The gas distributor had a truncated cone form.